pro bel TX 520 User manual

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1.1 Typographical conventions 5

1.2 Abbreviations 6

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2.1 Layout of the TX 520 8

2.2 Source selection busses 9

2.3 Source names 10

2.4 Video/audio breakaway 11

2.5 The unity gain buttons 11

2.6 The plasma display 11

2.7 Downstream keyers 13

2.8 Optional DVE 13

2.9 Audio-overs 13

2.10 Video/audio monitoring 14

2.11 Machine control 14

2.12 Automation control 14

2.13 Bypass switcher control 15

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3.1 Selecting sources on preset (PST) 17

3.2 Selecting the transition type and rate 18

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3.3 Taking a transition to air 20

3.4 Taking married video/audio with a pre-rolled

machine 22

3.5 Taking married video/audio with a manually

rolled machine 23

3.6 Leading in audio before video 24

3.7 Manually holding an automated transition 25

3.8 Manually taking an automated transition 25

3.9 Switching on-air to black/silence 26

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4.1 Manually taking a DSK to air 27

4.2 Taking a DSK from air 28

4.3 Setting a DSK to follow the next transition 29

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5.1 Selecting a DVE sequence 31

5.2 Previewing a DVE sequence 31

5.3 Taking a DVE sequence to air 32

5.4 Taking a DVE sequence from air 32

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6.1 Setting up audio-overs 34

6.2 Adjusting the audio-over levels 35

6.3 Previewing an audio-over 36

6.4 Taking an audio-over to air 37

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6.5 Taking an audio-over from air 38

6.6 Setting the audio-over to follow the next

transition 39

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7.1 Monitoring sources via AUX1 41

7.2 Monitoring sources via AUX2 42

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8.1 Monitoring an audio source 44

8.2 Monitoring in multi-level environment 45

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9.1 Controlling a dedicated machine 47

9.2 Controlling a routed machine 48

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11.1 Using the bypass switcher panel 52

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12.1 Stop watch and timer modes 56

12.2 Screens accessible from the home page 59

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13.1 Setting wipe pattern, direction and softness 61

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15.1 Setting up the audio gain for a source 68

15.2 Temporarily restoring unity gain 69

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16.1 Viewing the current audio routing 70

16.2 Editing the audio routing 72

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17.1 Selecting multiple channels 75

17.2 Controlling multiple channels 76

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This user guide has been developed for operators of Pro-Bel’s TX 520 Master

Control Switcher. Chapter 2 provides an overview of the TX 520, with subsequent

chapters giving details and step-by-step instructions for using various features of

the TX 520.

Other documentation may be required, depending on how the

TX 520 is set up. For example, the technical manual provides information on the

configuration screens which are not detailed in this operators guide.

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Certain conventions are used in this guide to indicate different types of information.

Names of buttons and controls on the TX 520 are shown in this guide in bold

capitals, within brackets, like this : <VIDEO ONLY> .

Procedures are shown as numbered steps, for example:

1 This is what to do first to perform this operation.

This states what happens or other related information.

2 Then do this.

This states what happens.

Pictures/diagrams are also provided to show screens and/or button locations

relevant to the procedure.

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Within this document the following abbreviations and acronyms are used:

PST Preset

PGM Programme

RTC Real Time Clock

TOD Time Of Day

TC Time Code

VU Volume Meter

PPM Peak Program Meter

dBFS Decibels at Full Scale

dBu Decibels

AUX Auxiliary

DSK Downstream Keyer

FTB Fade to Black

PIN Personal Identification Number

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Pro-Bel’s TX 520 Digital Master Control Switcher is a self-contained component

digital video and AES/EBU audio transmission mixing system. It is normally

operated from the control panel but can be remotely controlled by an automation

system. It can be set up to support single or multi-level audio.

The TX 520 can be used for:

· Making transitions of sources to air using cuts, various fade/take

combinations and wipes (see chapter 3).

· Adding downstream keys (see chapter 4).

· Defining and making audio-overs (see chapter 6).

· Monitoring audio and video sources (see chapters 7 and 8).

· Correcting audio levels (see chapter 15). The TX 520 can also be set up to

support multi-level audio, allowing editing of the audio routing and selection

of the audio level to monitor on the audio monitoring speakers (see chapter

16).

· An optional DVE is also available, providing up to 24 pre-programmed

moves (see chapter 5)

A plasma display (see chapter 12) provides dynamic monitoring of audio levels

and control of system parameters. In addition, the plasma display is used for

system setup and configuration.

Configuration details are provided in the technical manual.

Two auxiliary busses (see chapter7) allow previewing of sources without affecting

the preset or programme selections. Two independent dual channel outputs

provide audio monitoring (see chapter 8).

From the TX 520 console, up to three remote machines can be controlled directly

(for example, VTRs, laser disks, etc.), or up to 20 sources if the TX 520 is

connected to an RS422 router.

The TX 520 can be operated manually or integrated with a station automation

system (see chapter 10).

For fail safe operations, an external bypass switcher may be controlled from the

TX 520 (see chapter 11).

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The above diagram of the TX 520, shows the buttons and controls that are grouped

for various operations. The numbers in the diagram correspond to those included in

the following explanations.

BYPASS SWITCHER

MONITOR 1

MONITOR 2

MACHINE CONTROL AUTOMATION

AUX

PGM

PST

0

AUX SELECT

OVER

PGM

OVER

520

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The upper console includes:

(1) bypass switcher control and (13) buttons for selecting the audio level to monitor

(if the TX 520 is configured for multi-level audio), (14) the buttons for multi-channel

control (if connected), (2) the plasma display, and (3) audio monitoring control.

The top row of the lower console includes:

(4) Machine control.

(5) Automation control.

(6) The <BLACK/SIL> button, permitting the output to be faded or cut to

black/silence.

The centre of the lower console includes:

(7) Source selection busses - AUX, PGM, and PST - and the source name display

for all the busses. At the end of each row of source selection buttons, a single

small button is used for controlling unity audio gain for that bus.

(8) Buttons for selecting the auxiliary bus (AUX SELECT), either AUX1 or AUX2.

(9) Audio-over control.

The bottom row of the lower console includes buttons for:

(10) selecting a transition type, (11) taking sources to air, to (12) downstream

keyers (DSK1 to DSK4) and (15) DVE controls.

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There are four source selection busses, operated through three rows of source

buttons, located in the black background on the lower console. The TX 520 can

have up to 20 sources accessible to each bus. An additional four sources are

available through the auxiliary busses for monitoring independent sources, for

example, audio-overs, DSK and DVE previews, etc.

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The white keys (AUX) provide access to sources for either of two auxiliary busses

(AUX1 or AUX2), depending on which AUX SELECT buttons are lit. The auxiliary

busses are used for monitoring sources (see chapter 7).

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The red keys (PGM) are the selection buttons for programme, the sources that

may be taken to air. Pressing a PGM button takes that source to air immediately.

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The yellow keys (PST) are the source selection buttons for the preset. Preset

indicates which sources will be on-air when a take is made, lighting up the

corresponding sources on PGM (see chapter 3).

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The 4-character alphanumeric name for each source is shown in the row of

displays between the red programme (PGM) buttons and the yellow preset (PST)

buttons.

The displayed source names can be assigned or changed by using the plasma

display (refer to the technical manual). Alternatively, they can be downloaded from:

· A central assignment routing system employing a System 3 controller.

· An external automation system.

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Pressing a single source button on PST or PGM selects married video/audio for

that source (provided the < VIDEO ONLY > and

< AUDIO ONLY > buttons are not lit). The button pressed will light at full

brightness.

Video/audio breakaway is achieved by using the <VIDEO ONLY> or the <AUDIO

ONLY> buttons. First press the <VIDEO ONLY> or the <AUDIO ONLY> button

followed by a source selection button.

A fully bright source button indicates the selected video source.

A half bright source button indicates the selected audio source.

On AUX1, married or separate video and audio sources are selected using the

AUX SELECT buttons (see chapter 7). AUX2 is always married.

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To the right of each row of source selection buttons, a single button indicates the

status of unity audio gain for the selected source. If the unity gain button is lit, the

source is not at unity gain.

The source can be temporarily set to unity audio gain (see chapter 14) by pressing

the unity gain button. The button is no longer lit. To permanently correct the source

level it is necessary to use a screen on the plasma display to set the values (see

chapter 14).

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The plasma display, in the middle of the upper console, is used to:

· Monitor audio levels of the source selection busses.

· Define audio, DSK, wipe and DVE setups.

· Configure the TX 520 for the site.

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The home screen (see chapter 12) is the top level screen. It shows the dual

channel audio levels for the busses, a stop watch or timer, and station clock.

It is possible to return directly to the home screen (regardless of the screen

currently displayed) by using the <HOME> button.

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The row below the plasma display includes, from left to right:

· The <PAGE> button. On screens where other pages are available, a small

rectangle appears above this button indicating it is active. For multi-level

audio systems, pressing the <PAGE> button causes the display of audio

information (for example, on the home screen) to change from one level to

another. For single-level audio systems, this button has no function.

· Four controls, used for selecting values in the various configuration

screens. Turning a control clockwise increases the value. Turning it anti-

clockwise reduces the value.

· The <HOME> button. For operational screens, pressing <HOME> once re-

displays the home screen.

The square grey buttons in the vertical rows to the left and right of the plasma

display change function according to the screen displayed on the panel. Labels for

active buttons are shown along the left and right edges of each screen.

<PAGE> button

<HOME> button

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For example, on the home screen:

The left vertical column has three buttons for using the stop watch (see

chapter 12), and one for accessing the system configuration screens.

The right vertical column includes buttons for moving to other screens:

wipe screen (see chapter 13), DSK screen (see chapter 14), and the audio

(gain) setup screen (see chapter 15).

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The TX 520 provides up to four independent downstream keys, DSK1 to DSK4

(see chapter 4). Keys can be cut or faded to air. DSK transitions can also be set to

follow the next video or DVE transition.

All DSK's are fully linear and have separate control of clip and gain, as set up

using the plasma display.

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An optional DVE is available for the TX 520 (see chapter 5). This provides up to

24 selectable DVE moves for on screen squeeze effects.

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The TX 520 provides powerful audio-over facilities (see chapter 6), using two

controls which determine the programme and over levels when the over is cut or

faded to air:

· <OVER> controls the gain of the over source.

· <PGM> sets the level of programme audio to be mixed with the over

source.

Any one of four external over sources are available through the TX 520, with each

source having its own settings for <OVER> and <PGM> level.

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The over source can be cut or faded to air by pressing a single button. The fade

rate is defined through a screen on the plasma display. It can also be set to follow

the next video or DVE transition.

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Two auxiliary monitoring busses, AUX1 and AUX2, can be accessed directly from

the TX 520 (see chapter 7).

AUX1 can have separate or married video and audio. AUX2 has married video

and audio only.

For audio monitoring (see chapter 8), there are two sets of dual channel outputs

selecting PGM, PST, AUX1, AUX2, or off-air/external sources. The audio level for

each can be cut or dimmed via dedicated buttons, with a variable control for

volume

If the TX 520 has been installed to support multi-level audio, eight push buttons

allow the selection of the audio level to be heard on the main control system

speaker outputs.

The first four buttons allow selection of the stereo audio channel for the monitor 1

speaker. The last four buttons are for selecting those for the monitor 2 speaker.

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The TX 520 allows control of connected machines (for example, VTRs) either

directly through buttons on the control panel console.

Three buttons are used to elect the machine to be operated. The way this works

depends on how the TX 520 is installed. The buttons can be dedicated to three

directly connected machines or they can be connected to an external router,

allowing control of up to 20 machines.

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If the installation has an automation system (for example, the Pro-Bel Compass

System), the following features of the TX 520 can be controlled automatically:

PST source selection.

Transition type and rate.

DSK and audio-over.

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The TX 520 provides control of an external 8 x 1 bypass switcher independent

from the panel and the control system.

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This chapter describes how to set up the next transition manually and take it to air.

If the TX 520 is connected to a presentation automation system, for example, Pro-

Bel’s Compass system, the programme can be setup and taken to air

automatically.

AUX

PGM

PST

In normal operation transitions are made by:

1 Selecting the video and audio sources (see chapter 2). These are first

selected on the preset (PST) bus.

2 Selecting the transition type and speed by pressing white buttons in

the bottom row on the lower console.

3 If desired, selecting one or both DSKs (see chapter 4) and an audio-over

(see chapter 6) to follow the transition.

4 Taking the transition by using red buttons in the bottom row on the lower

console. A transition can also be held manually.

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It is preferred practice to set up the transition on the preset (PST) bus. The

selection can be either select married video/audio from the same source (see

Step1 below), or video and audio from different sources (see Steps 2 and 3).

At the bottom left of the lower console, the <VIDEO ONLY> and <AUDIO ONLY>

buttons are used for setting up video/audio breakaway.

1 To select married video/audio, first ensure that neither

<VIDEO ONLY> nor <AUDIO ONLY> is lit. Then press the required source

selection button on the PST bus.

The PST source button is lit at full brightness.

PST

2 To select only a new video preset, select the video by pressing <VIDEO ONLY>

to light it, then press the required source button on the PST bus.

The newly selected source button is lit at full brightness indicating video

only selection. The original source button is lit at half brightness, indicating

audio only.

3 To select only a new audio preset, press <AUDIO ONLY> to light it and then

press the source button on PST from which you want the audio.

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The newly selected source button is lit at halfbrightness indicating audio

only selection. The original source button is lit at full brightness, indicating

video only.

Note: The <AUDIO ONLY> and <VIDEO ONLY> buttons can be configured to be

either manually or automatically cancelled after selection. Refer to the technical

manual for details.

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The type and speed of a transition are selected by pressing buttons in the lower

console. These buttons are configured using screens on the plasma display. For

details refer to the technical manual.

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The type and speed of transition are selected by pressing the appropriate

transition type white button in the bottom row of the lower console.

The available transition types are indicated by the buttons (from left to right):

<CUT> Cut directly to the selected sources without fading or using a wipe.

<V FADE> Fade out the current programme to black and then fade in the new

programme.

<TAKE/FADE UP> Cut the current programme and then fade in the new

programme.

<FADE DOWN/TAKE> Fade out the current programme and then cut in the new

programme.

<MIX> Fade out the current programme and at the same time fade in the new

programme.

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<WIPE> Use the currently set up wipe pattern, direction and softness. The current

wipe pattern is shown in the top right of the home screen on the plasma display

(see chapter 13).

The audio will perform a mix if < WIPE > is pressed for the selected transition.

Note: If a fade transition is selected (either <V FADE>,

<TAKE/FADE UP> or <FADE DOWN/TAKE>), and the <TAKE> or <PRE-

ROLL&TAKE> button is pressed and held down, the transition will stay at the

intermediate black/silence until the <TAKE> or

<PRE-ROLL&TAKE> button is released.

1 Select the type of transition by pressing <CUT>, one of the four fade patterns,

or <WIPE>.

2 If <WIPE> was selected at step 1, the current wipe pattern shown in the top

right-hand corner of the home screen will be used.

To change the wipe pattern, direction or softness, see chapter 13.

3 Select the transition rate for a fade or wipe by pressing one of <SLOW>,

<MED> or <FAST>.

The selected transition rate button is lit.

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Note: The rates in frames per second are displayed on the DSK screen (see

chapter 12) To change these rates refer to the technical manual. One or two DSKs

(see chapter 4) plus an audio over (see chapter 6) can also be added to the

transition.

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A take replaces the programme on-air with the sources that are preselected on the

PST bus. The take uses the transition type and speed that have already been

selected.

DSKs (see chapter4) and an audio-over (see chapter 6) can be set to follow the

transition.

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The red buttons in the centre of the bottom row of the lower console are used to

carry out a transition. They are as follows:

DVE

<PRE-ROLL & TAKE>

Used to start a machine (for example, a VTR) and take married video/audio to air

after a pre-configured delay. The pre-roll countdown timer displays above this

button.

When the switcher is automated by Pro-Bel automation, processing the <PRE-

ROLL & TAKE> button causes the next event to take.

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pro bel TX 520 User manual

pro bel TX 520 User manual

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